Ryan O’Neal, who’s in court over ownership of an Andy Warhol portrait of Farrah Fawcett, caused a scene during a break in the trial Thursday.

He screamed at Redmond O’Neal after his son testified about the painting, and then ignored press outside the courthouse, “You are so arrogant! Do it for your mom! Why do you always have to argue with me?”

Redmond then addressed reporters, “This is a family heirloom. It has no value other than that.”